Discussions By Condition: I cannot get a diagnosis.

Unusual weight issue, docs are mystified!

Two years ago, I put on 25 pounds in the course of a week/week and a half. Not exaggerating. From 115 to 140. At the same time, I felt extremely tired and slept much more than usual, and I developed cognitive/memory issues (my memory is now absolutely horrible). The fatigue did wane some after a few months, but strangely, my weight and cognition did not change.

No matter what type of diet/exercise plan I've tried (and I've tried several), my weight will not budge. Conversely, if I eat whatever I want, I won't gain more than 1-2 pounds, either. My weight is completely out of my control; it is literally impossible for me to drop more than one pound, even when on an eating plan that would make a supermodel proud. The docs have ruled out HIV, mono, and endocrine, thyroid, and hormone issues. I have been given a tentative diagnosis of chronic fatigue syndrome, but both my primary care doc and my endo are at a loss when it comes to the weight.

I don't know what to do; I need a real answer. What could cause something like this? I've never heard of someone completely unable to lose any weight with diet and exercise. Please, please help.